Air Cooled CNC Spindle Motor
Genuine HQD 3.5 kW / 3.7 kW heavy-duty air-cooled CNC electrospindle motor operating at up to 18,000 RPM. Engineered with an ER20 precision collet taper, 220V single/three-phase winding, four matched P4 angular contact bearings, and an integrated aerodynamic impeller for continuous high-speed routing in wood, acrylic, and non-ferrous metals.
- check_circle Genuine HQD Brand Quality: Globally recognized for reliability and precision in commercial CNC routing machinery.
- check_circle 3.5 kW / 3.7 kW Continuous Power: Provides high torque across a wide 6,000 to 18,000 RPM operating band.
- check_circle Self-Contained Air Cooling: Eliminates water chillers, water pumps, tubing leaks, and antifreeze maintenance.
- check_circle Four P4 Angular Contact Bearings: Rigid bearing assembly easily absorbs heavy axial and lateral cutting loads.
- check_circle Sub-0.005 mm Collet Runout: Ultra-low runout eliminates tool vibration, delivering silky smooth surface finishes on wood and acrylic.
- check_circle Standard ER20 Collet Chuck: Accepts all standard tool shanks from 1 mm to 13 mm with high clamping torque.
- check_circle Square Mounting Extrusion Profile: Flat face bolts directly to standard Z-axis gantry plates for easy alignment.
Target Applications & Use Cases
Industrial Applications FitContinuous high-feed carving of MDF cabinet doors, kitchen carcass components, plywood shelving, and solid wood furniture.
Vibration-free high-speed trimming and pocketing of cast acrylic panels, Corian solid surfaces, and phenolic boards.
High-velocity 90-degree V-grooving and contouring of ACP cladding sheets for architectural building facades.
Precision face milling and profile cutout of brass plaques, aluminum molds, instrument panels, and heatsinks.
Intricate 3D carving on hardwood panels, dense polyurethane modeling boards, and EPS architectural foam.
Engineering & Production Benefits
Key Operational AdvantagesAir cooling removes all risk of water leaks damaging the CNC bed or MDF workpieces, and requires zero chiller upkeep.
Sub-micron spindle runout ensures uniform chip loads across all tool flutes, preventing premature micro-chipping of expensive bits.
Standard square body profile and pre-wired aviation plug allow quick drop-in replacement on existing CNC machinery.
Class F insulation and high-volume internal fan maintain cool bearing temperatures even under aggressive feed rates.
Spare Part Overview & Technical Description
High-Precision Air-Cooled Industrial CNC Electrospindle Motor (3.5 kW / 18,000 RPM)
The HQD 3.5 kW (rated up to 3.7 kW peak) Air-Cooled CNC Spindle Motor is a high-performance motorized electrospindle designed for heavy-duty 3-axis and multi-axis CNC routing machines, nesting centers, and automated woodworking lines. Operating at variable speeds up to 18,000 RPM at 300 Hz excitation frequency, this electrospindle delivers exceptional torque density and radial rigidity, effortlessly handling deep tool plunges, high-feed mortising, aluminum profile grooving, and 3D wood contouring.
Engineered with an internal forced-air aerodynamic fan impeller mounted directly to the rotor shaft, this spindle eliminates the complex plumbing, leak risks, and coolant chiller maintenance required by water-cooled spindles. As the spindle accelerates, the impeller forces continuous high-velocity ambient air through axial cooling fins machined along the aluminum extrusion casing, maintaining safe thermal equilibrium across the stator windings even during non-stop multi-shift factory production.
Precision Rotor Dynamics, Bearing Architecture & Tooling Highlights:
- Four Matched P4 Super-Precision Bearings: Features two 7005C/P4 and two 7002C/P4 angular contact bearings arranged in a rigid back-to-back configuration to withstand severe combined axial plunging loads and lateral milling thrusts.
- Sub-Micron Runout Accuracy: Rotor is dynamically balanced to ISO 1940 G1 grade, maintaining radial runout below 0.005 mm at the collet taper to ensure uniform chip load per tooth and extend carbide end mill life.
- Standard ER20 Precision Collet System: Accommodates tool shanks from 1 mm to 13 mm (including standard 1/8", 1/4", 1/2", 3 mm, 6 mm, and 12 mm router bits) with a balanced ER20 clamping nut.
- Square Aluminum Extrusion Body: Precision ground flat mounting face enables direct drop-in bolting to CNC router Z-axis carriages without requiring custom circular mounting clamps.
- Aviation-Grade Electrical Terminal: Equipped with a 4-pin quick-disconnect metal aviation connector for secure ground and phase wiring that resists machine vibrations.
Full Specifications Sheet
| Specification | Parameter / Value |
|---|---|
| Brand & Manufacturer | HQD Spindle Motor Technology |
| Model Name / Number | HQD 3.5KW / ER20 Air-Cooled |
| Spindle Motor Type | High-Speed AC Induction Electrospindle Motor |
| Power Rating | 3.5 kW Continuous (3.7 kW Peak Rating) |
| Application / Usage | CNC Wood Routers, Milling Machines & Engravers |
| Country of Origin | Made in India |
| Operating Voltage | AC 220 V (Compatible with 220V VFD Inverters) |
| Rated Current | 12.0 A to 15.0 A |
| Rated Operating Frequency | 300 Hz (Max 400 Hz) |
| Motor Phase Configuration | Single Phase / 3-Phase Variable Frequency Drive |
| Maximum Spindle Speed | 18,000 RPM (Variable Speed via VFD) |
| Bearing Configuration | 4 Matched Super-Precision P4 Angular Contact Bearings |
| Bearing Models | 2 x 7005C/P4 + 2 x 7002C/P4 Matched Pairs |
| Radial Runout Accuracy | < 0.005 mm (< 5 Microns at Collet Taper) |
| Toolholder Collet Size | Standard ER20 Precision Collet Chuck |
| Supported Tool Shank Diameter | 1 mm to 13 mm (1/8", 1/4", 1/2" Compatible) |
| Housing Body Profile | Square Extruded Aluminum Alloy with Ground Mounting Face |
| Cooling Method | Forced-Air Self Cooling via Integrated Rotor Impeller |
| Electrical Connector | GX16 4-Pin Heavy-Duty Aviation Plug |
| Lubrication System | Precision German High-Speed Synthetic Grease Lubrication |
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